You can use Win32 Disk Imager to make a full backup image of your SD card by inserting your SD card into your reader, starting the program, and creating a filename to store the image in. Simply click on the Read button instead to read the image from the SD card and write it to a new image file.
To make a backup of your system, or to clone to another SD card using Raspberry Pi, use the SD Card Copier (available from the desktop menu via the Accessories | SD Card Copier).
Insert an SD card into a card reader into a spare USB port of Raspberry Pi and select the new storage device, as shown in the following screenshot:
SD Card Copier program
Before continuing, the SD Card Copier will ...
